body{
    //height:100%;
    padding-top:2rem;
}
header{
    width:100%;
    max-width:750px;
    line-height: 2rem;
    padding:0 0.5rem;
    background:@footer-background-color;
    position: fixed;
    top: 0;
    z-index: 100;
    text-align: center;
    zoom:1;
    font-size:0.7rem;
    height:2rem;
    .iconfont{
        font-size:0.9rem;
    }
}
header:after{  //清除浮动
    content:"";
    line-height:0;
    width:0;
    height: 0;
    display:block;
    visibility:hidden;
    clear:both;
}

header>div.header-center{
    overflow: hidden;
    text-overflow:ellipsis;
    white-space: nowrap;
    padding: 0 1rem;
}
header span{
    vertical-align: middle;
}

header .pol{
    position:absolute;
    left: .5rem;
    top: 0;
}
header .por{
    position:absolute;
    right: .5rem;
    top: 0;
}
